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?? aliki.js(14.38 KB)
?? c_highlighter.js(9.11 KB)
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Editing: c_highlighter.js

/**
 * Client-side C syntax highlighter for RDoc
 */

(function() {
  'use strict';

// C control flow and storage class keywords
  const C_KEYWORDS = new Set([
    'auto', 'break', 'case', 'continue', 'default', 'do', 'else', 'extern',
    'for', 'goto', 'if', 'inline', 'register', 'return', 'sizeof', 'static',
    'switch', 'while',
    '_Alignas', '_Alignof', '_Generic', '_Noreturn', '_Static_assert', '_Thread_local'
  ]);

// C type keywords and type qualifiers
  const C_TYPE_KEYWORDS = new Set([
    'bool', 'char', 'const', 'double', 'enum', 'float', 'int', 'long',
    'restrict', 'short', 'signed', 'struct', 'typedef', 'union', 'unsigned',
    'void', 'volatile', '_Atomic', '_Bool', '_Complex', '_Imaginary'
  ]);

// Library-defined types (typedef'd in headers, not language keywords)
  // Includes: Ruby C API types (VALUE, ID), POSIX types (size_t, ssize_t),
  // fixed-width integer types (uint32_t, int64_t), and standard I/O types (FILE)
  const C_TYPES = new Set([
    'VALUE', 'ID', 'size_t', 'ssize_t', 'ptrdiff_t', 'uintptr_t', 'intptr_t',
    'uint8_t', 'uint16_t', 'uint32_t', 'uint64_t',
    'int8_t', 'int16_t', 'int32_t', 'int64_t',
    'FILE', 'DIR', 'va_list'
  ]);

// Common Ruby VALUE macros and boolean literals
  const RUBY_MACROS = new Set([
    'Qtrue', 'Qfalse', 'Qnil', 'Qundef', 'NULL', 'TRUE', 'FALSE', 'true', 'false'
  ]);

const OPERATORS = new Set([
 '==', '!=', '<=', '>=', '&&', '||', '<<', '>>', '++', '--',
 '+=', '-=', '*=', '/=', '%=', '&=', '|=', '^=', '->',
 '+', '-', '*', '/', '%', '<', '>', '=', '!', '&', '|', '^', '~'
 ]);

// Single character that can start an operator
 const OPERATOR_CHARS = new Set('+-*/%<>=!&|^~');

function isMacro(word) {
    return RUBY_MACROS.has(word) || /^[A-Z][A-Z0-9_]*$/.test(word);
  }

function isType(word) {
    return C_TYPE_KEYWORDS.has(word) || C_TYPES.has(word) || /_t$/.test(word);
  }

/**
 * Escape HTML special characters
 */
 function escapeHtml(text) {
 return text
 .replace(/&/g, '&amp;')
 .replace(/</g, '&lt;')
 .replace(/>/g, '&gt;')
 .replace(/"/g, '&quot;')
 .replace(/'/g, '&#39;');
 }

/**
   * Check if position is at line start (only whitespace before it)
   */
  function isLineStart(code, pos) {
    if (pos === 0) return true;
    for (let i = pos - 1; i >= 0; i--) {
      const ch = code[i];
      if (ch === '\n') return true;
      if (ch !== ' ' && ch !== '\t') return false;
    }
    return true;
  }

/**
   * Highlight C source code
   */
  function highlightC(code) {
    const tokens = [];
    let i = 0;
    const len = code.length;

while (i < len) {
 const char = code[i];

// Multi-line comment
 if (char === '/' && code[i + 1] === '*') {
 let end = code.indexOf('*/', i + 2);
 end = (end === -1) ? len : end + 2;
 const comment = code.substring(i, end);
 tokens.push('', escapeHtml(comment), '');
 i = end;
 continue;
 }

// Single-line comment
 if (char === '/' && code[i + 1] === '/') {
 const end = code.indexOf('\n', i);
 const commentEnd = (end === -1) ? len : end;
 const comment = code.substring(i, commentEnd);
 tokens.push('', escapeHtml(comment), '');
 i = commentEnd;
 continue;
 }

// Preprocessor directive (must be at line start)
 if (char === '#' && isLineStart(code, i)) {
 let end = i + 1;
 while (end < len && code[end] !== '\n') {
 if (code[end] === '\\' && end + 1 < len && code[end + 1] === '\n') {
 end += 2; // Handle line continuation
 } else {
 end++;
 }
 }
 const preprocessor = code.substring(i, end);
 tokens.push('', escapeHtml(preprocessor), '');
 i = end;
 continue;
 }

// String literal
 if (char === '"') {
 let end = i + 1;
 while (end < len && code[end] !== '"') {
 if (code[end] === '\\' && end + 1 < len) {
 end += 2; // Skip escaped character
 } else {
 end++;
 }
 }
 if (end < len) end++; // Include closing quote
 const string = code.substring(i, end);
 tokens.push('', escapeHtml(string), '');
 i = end;
 continue;
 }

// Character literal
 if (char === "'") {
 let end = i + 1;
 // Handle escape sequences like '\n', '\\', '\''
 if (end < len && code[end] === '\\' && end + 1 < len) {
 end += 2; // Skip backslash and escaped char
 } else if (end < len) {
 end++; // Single character
 }
 if (end < len && code[end] === "'") end++; // Closing quote
 const charLit = code.substring(i, end);
 tokens.push('', escapeHtml(charLit), '');
 i = end;
 continue;
 }

// Number (integer or float)
 if (char >= '0' && char <= '9') {
 let end = i;

// Hexadecimal
 if (char === '0' && (code[i + 1] === 'x' || code[i + 1] === 'X')) {
 end = i + 2;
 while (end < len) {
 const ch = code[end];
 if ((ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F')) {
 end++;
 } else {
 break;
 }
 }
 }
 // Octal
 else if (char === '0' && code[i + 1] >= '0' && code[i + 1] <= '7') {
 end = i + 1;
 while (end < len && code[end] >= '0' && code[end] <= '7') end++;
 }
 // Decimal/Float
 else {
 while (end < len) {
 const ch = code[end];
 if ((ch >= '0' && ch <= '9') || ch === '.') {
 end++;
 } else {
 break;
 }
 }
 // Scientific notation
 if (end < len && (code[end] === 'e' || code[end] === 'E')) {
 end++;
 if (end < len && (code[end] === '+' || code[end] === '-')) end++;
 while (end < len && code[end] >= '0' && code[end] <= '9') end++;
 }
 }

// Suffix (u, l, f, etc.)
 while (end < len) {
 const ch = code[end];
 if (ch === 'u' || ch === 'U' || ch === 'l' || ch === 'L' || ch === 'f' || ch === 'F') {
 end++;
 } else {
 break;
 }
 }

const number = code.substring(i, end);
 tokens.push('', escapeHtml(number), '');
 i = end;
 continue;
 }

// Identifier or keyword
 if ((char >= 'a' && char <= 'z') || (char >= 'A' && char <= 'Z') || char === '_') {
 let end = i + 1;
 while (end < len) {
 const ch = code[end];
 if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
 (ch >= '0' && ch <= '9') || ch === '_') {
 end++;
 } else {
 break;
 }
 }
 const word = code.substring(i, end);

if (C_KEYWORDS.has(word)) {
 tokens.push('', escapeHtml(word), '');
 } else if (isType(word)) {
 // Check types before macros (VALUE, ID are types, not macros)
 tokens.push('', escapeHtml(word), '');
 } else if (isMacro(word)) {
 tokens.push('', escapeHtml(word), '');
 } else {
 // Check if followed by '(' -> function name
 let nextCharIdx = end;
 while (nextCharIdx < len && (code[nextCharIdx] === ' ' || code[nextCharIdx] === '\t')) {
 nextCharIdx++;
 }
 if (nextCharIdx < len && code[nextCharIdx] === '(') {
 tokens.push('', escapeHtml(word), '');
 } else {
 tokens.push('', escapeHtml(word), '');
 }
 }
 i = end;
 continue;
 }

// Operators
 if (OPERATOR_CHARS.has(char)) {
 let op = char;
 // Check for two-character operators
 if (i + 1 < len) {
 const twoChar = char + code[i + 1];
 if (OPERATORS.has(twoChar)) {
 op = twoChar;
 }
 }
 tokens.push('', escapeHtml(op), '');
 i += op.length;
 continue;
 }

// Everything else (punctuation, whitespace)
      tokens.push(escapeHtml(char));
      i++;
    }

return tokens.join('');
  }

/**
   * Initialize C syntax highlighting on page load
   */
  function initHighlighting() {
    const codeBlocks = document.querySelectorAll('pre[data-language="c"]');

codeBlocks.forEach(block => {
      if (block.getAttribute('data-highlighted') === 'true') {
        return;
      }

const code = block.textContent;
      const highlighted = highlightC(code);

block.innerHTML = highlighted;
      block.setAttribute('data-highlighted', 'true');
    });
  }

if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', initHighlighting);
  } else {
    initHighlighting();
  }
})();

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Editing: c_highlighter.js

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